vulkan: add copyright notices

Change-Id: I62ec6d02a052c9e9cee9753057d55c165dfc9713
(cherry picked from commit b7f416a9cc3d136ffe4a60b5f6fb2dc8b92a623b)
diff --git a/vulkan/libvulkan/entry.cpp.tmpl b/vulkan/libvulkan/entry.cpp.tmpl
index 3eabe2e..352ac59 100644
--- a/vulkan/libvulkan/entry.cpp.tmpl
+++ b/vulkan/libvulkan/entry.cpp.tmpl
@@ -1,3 +1,19 @@
+{{/*
+ * Copyright 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */}}
+
 {{Include "../api/templates/vulkan_common.tmpl"}}
 {{Macro "DefineGlobals" $}}
 {{$ | Macro "entry.cpp" | Reflow 4 | Write "entry.cpp"}}